Which of the following are the three principles of experimental design?
A) Confound, Randomize, Small Samples
B) Confound, Randomize, Large Samples
C) Control, Randomize, Small Samples
D) Control, Randomize, Large Samples

Question

Quizplus · Accepted Answer

The three principles of experimental design are control, randomize, and use large sample sizes. Choice C is incorrect because small sample sizes can lead to less reliable results. Choice A is incorrect because a confound (an unrelated variable that affects the results) is something that should be avoided in experimental design, not intentionally included. Choice B is incorrect because randomization and large samples are important principles of experimental design, but control is equally important in order to minimize extraneous variables that could affect the results.

Which of the Following Are the Three Principles of Experimental